NYC residents should cover face when in public, mayor says

The Manhattan skyline is seen behind the parking lot and terminal of the Brooklyn Cruise Terminal, Thursday, April 2, 2020 in New York. N.Y. New York Gov. Governor Andrew Cuomo announced last week that the terminal with be transformed into a temporary field hospital to increase New York's hospital capacity while cases of the coronavirus skyrocket. (AP Photo/Mary Altaffer)

This video frame grab provided by Office of the Governor, shows New York Gov. Andrew Cuomo, left, as he speaks with his brother, CNN anchor Chris Cuomo in his home basement, during the governor's news conference in Albany, NY, Thursday, April 2, 2020. The prime-time host is one of the most visible media figures to test positive for the coronavirus, (Office of the Governor via AP)

Manhattan skyline is seen behind the parking lot and terminal of the Brooklyn Cruise Terminal, Thursday, April 2, 2020 in New York. N.Y. Gov. Andrew Cuomo announced that the terminal with be transformed into a field hospital to increase New York's hospital capacity while cases of the coronavirus skyrocket. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Mary Altaffer)

In this undated family photo provided by Victor-Luis Vizcaino, his father embraces his mother, Sandra Santos-Vizcaino. Santos-Vizcaino, who taught third grade at an elementary school in the Brooklyn borough of New York, is the first New York City school teacher reported to have died of COVID-19, the disease caused by the new coronavirus. (Vizcaino Family Photo via AP)